Topic Summaries
Moments
Energy and power
Renewable energy and efficiency
Charge, current, and electric fields
Potential difference and resistors
Electricity
Volume and gases
States of matter and heat capacity
Radiation
Nuclear fusion and fission
Forces
Velocity and acceleration
Gravity and Newton's Laws
Moments and elastic potential
Pressure
Stopping, braking, and momentum
Properties of waves
Electromagnetic waves
Refraction and lenses
Light, colour, and ray diagrams
Absorbing and emitting infrared radiation
Magnetic fields
Motor effect, generator effect, and transformers
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
Energy and power
Renewable energy and efficiency
Charge, current, and electric fields
Potential difference and resistors
Electricity
Volume and gases
States of matter and heat capacity
Radiation
Nuclear fusion and fission
Forces
Velocity and acceleration
Gravity and Newton's Laws
Moments and elastic potential
Pressure
Stopping, braking, and momentum
Properties of waves
Electromagnetic waves
Refraction and lenses
Light, colour, and ray diagrams
Absorbing and emitting infrared radiation
Magnetic fields
Motor effect, generator effect, and transformers
Science skills: Experimental procedures
Science skills: Presenting and using data
Science skills: Measuring results
- The moment of a force is the turning effect it causes.
- The moment can be calculated as \(\text{moment}=\text{force}\times\text{distance}\) or \(M=Fd\) where:
- \(M\) is the moment of the force in Nm
- \(F\) is the force in N
- \(d\) is the perpendicular distance from the line the force acts on to the pivot of the object it is acting on in m
- Levers help to improve the moment from a force by allowing it to act far from a pivot. They are used to lift heavy objects that are close to the pivot and so the moment of their weight is small.
- Gears will exert contact forces on each other of equal magnitude. The radius of the gear determines the turning effect this force produces.
Unlock Moments
Subscribe to SnapRevise+ to get immediate access to the rest of this resource.
Premium accounts get immediate access to this resource.